Carbureter.



Patented Aug. v21, 1917.

W. SHAKESPEARE. Jal. L W. SCHMID.

'cAmuHTERl APPLICATION FIiLED APR. l0. 1916'. 1,237,395.

l l l r n l o l n u l u l 1 l t IlIIIl//lll/lIl/llllllllll/ UNITED sTATEs PATENT oEEicE.

WILLIAM SHAKESPEARE, JB., AND WILLIAM SCHMID, OF KALAMAZOO, MICHIGAN, ASSIGNOBS T0 SHAKESPEARE COMPANY, OF KALAMAZOO, MICHIGAN.

CABBUBETEB.

`Specification of Letters Patent.- Patented A11-g. 21, 1917.

Original application led November 27, 1915, Serial No. 63,747. Divided and this application led April 10,

To aZZ t may concern:

Be it .known that we, WlLLIAM SHAKE- sPnARE, Jr., and WILLIAM SCHMID, citizens of the. United States, residing at the city and county of Kalamazoo, State of Michigan, have invented certain new and useful Improvements in Carbureters, of which the following is a specication,

This invention relates to lmprovements in .carbureters.

our applications for Letters Patent, Ser.v

NOS. 53,747 and 63,747, filed 5October 2, 1915', and November 27, 1915, respectively, the present application being a division of Ser. No. 63,747 and a continuation of the,

priming features of Ser. No. 53,747. Certain features Aof our improvements mare,

however, of"` qu ite general application and capable of being readily embodied in structureswhich vvary considerably from that illustrated herein and in our said appl1cations.

The main ob]ects ofy this inventlon are:

First, to provide in a carbureter an improved primer means whichis well adapted or the Starting of an engine under varying conditions. 1

Second, to provide a carbureter having priming or starting features which is very which is very simple and convenient? to structural details, win `definitely use.

Further objects, and objects relating to appear from the detailed description to follow.

We accomplish the objects ofour invention by the devices and means described in the following specification. The invention is clearly defined and pointed out 1n the claims. n

A structure which is a preferred embodiment of our invention is clearly illustrated in the accompanyinv drawing,- forming a part of this speciication, 1n w ich; Figure I isa vertical central section through a carbureter embodying the fea- 1916. Serial No. 90,241.

tures o f our invention, certain parts being shown 1n full hnes for convenience 1n illustratlon.

Fig. II is an inverted detail withv the fuel reservoir removed.

Fig. III is a detail section on a line corresponding to line 3-3 of Fig. II.

Fig. IV is a detail vertical section on a' line vcorresponding to line 4-4 of Fig. I, 60 l .showing details of the primer valve and its fuel connections.

Fig V is a detail section on a line corresponding to line 5--5 of F ig. I, showing details of the primer valve stop.

vIn the drawing, similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking inthe direction of the little l arrows at the ends -of the section lines. 70

. `body being made in sections for convenience The body member 1 has in manufacture, a centrally depending tubular portion 3 upon which the oil reservoir 4 is mounted, the reservoir having an opening in its bottom to receive the reduced threaded portion 5 of the part 3 and beingclamped thereon by the nut 6.

The top member 2 is provided with an air inlet passage 7 having a nipple or mouth 8 adapted to be connected to a means for 85 supplying heated air, the means not being illustrated, and a cold air mouth or inlet 9 open to the atmosphere. The mouth'9..is controlled by the butteriy'valve 10. The

stem 11 of the valve 10 is arranged in suit# 9d V able bearin in the walls of the inlet 9, one end extending to thevoutside for connection to the operating lever 12v and-the other for connection to the priming valve, as will be v hereinafterV described.

The body member 1 is provided with' a A fuel inlet passage 13'connected toeJ suitable supply pipe 14 by the coupling 15. The fuelinlet passage is controlled by the valve 16 arrangedwithin' l'the casing or -cage 17, 100

the valve being provided with a stem 18 projecting downwardly through the bottom of the cage to coact with the lever 19 of the float 20. The float is pivotally mounted at 2l on an ear 22 projecting from the tubular portion 3 of the body member 1.

rlhe reservoir is provided with a drain valve A tubular nozzle member 24 projects upwardly within the tubular portion 3 of the body member 1 and is connected with the fuel reservoir by means of the fuel passage 25. The fuel nozzle 26 is provided with a stem 27 having transverse openings 27 communicating with the passage 25. The stem 27 is threaded at its lower end for adjustment.

The body member 1 is provided with an annular valve seat 28 embraced by the depending mixing chamber wall 29 within the body member 1. The discharge of the mixing chamber 30 is controlled by the throttle 31. i 'lhe operating connections for the throttle are not illustrated as they Will be readily understood.

The mixing chamber walls are disposed in a spaced relation between the walls of the top member so that air may circulate from the passage 7 about the same and pass downwardly around the valve seat through the openings 32 below it and upwardly through the port 33 thereof to the mixing chamber. 'hen heated air is supplied to the carbureter the mixing chamber is heated thereby. The suction or air actuated member 34 seats on the valve seat 28 and is automatically actuated by the suction within the mixing chamber and the air passing thereto and constitutes a mixing chamber valve. This air actuated member 34 has a carbureting chamber 35 therein and a.tu'

bular depending portion 36 slidably `embracing the nozzle member 24 so that the nozzle member constitutes a guide for the suction actuated member and the nozzle delivers centrally to the carbureting chamber. The member 34 is provided with a conical valve 37 coacting with the nozzle member and constituting an air inlet valve for the carbureting chamber.

Air inlet openings 38 are grouped about the sleeve portion 36. i

The needle fuel valve 39 is carried about the sleeve actuated member 34 and projects into the fuel nozzle to coact therewith. The carbureting chamber topxpiece 40 is supported in a spaced relation to the bottom portion by the spaced blocks 41 to provide an annular slot-like discharge orifice or opening 42 delivering at the edge or periphery of the member 34. With the parts thus arranged, when the air actuated member is lifted from its seat an annular unobstructed portis provided for the mixing chamber and the carbureting chamber delivers into this air atI the periphery of the valve through this annular slot-like discharge port, so that the carbureted air is discharged in the manner to be most effectively mixed with the air passing to the mixing chamber.

The suction actuated member 34 is preferably provided with a dash-pot plunger 43 vcoacting with a cylinder 44 formed in the cross piece 45 in the mixing chamber. This dash-pot serves as a guide to the upper end of the air actuated member and, thus disposed, is subject to the variations of air pressures in the mixing chamber. These parts are shown in detail in our aforesaid application for Letters Patent, Ser. No. 63,747.

Our improved priming device comprises a fuel passage 46, 46 opening or delivering into the mixing chamber at the rear of or on the inner side of the mixing chamber inlet valve.

A fuel tube 47 dependsinto the reservoir below the normal fuel level thereof and constitutes an extension of the fuel passage 46, 46. This fuel tube is, in the structure illustrated, curved about the tubular portion 3 of the body member 1, so that it does not interfere with the float.

A conduit or passage 48 is arranged to deliver above the throttle valve 31. These priming passages 46, 46 and 48 are controlled by the rotary valve 49 having ay transverse fuel port 50 therein and a longitudinal port or passage 51, which opens into this fuel port 50 and into the air inlet chamber of the carbureter below the mixving chamber valve and into the port 52 which opens into the primer passage or conduit 48 when the rimer valve is opened. The priming valve 1s shown in Fig. I in its `open position, although.l during the normal vproviding a rich initial or starting mixture.

If the throttle valve is closed or substantially closed the priming mixture is delivered above the throttle and in view of the relatively high vacuum above the throttle when the throttle is closed a sutlicient quantity of fuel is delivered above the throttle to produce a suitable initial or starting mixture. 'I he suction of the engine, however, when the throttle is opened actuates the automatic or suction actuated member 34, opening the main fuel valve and taking up fuel and providing a suitable carbureted supply of air, so that the primer valve can be turned oil". It can be turned off gradually as the engine warms, if desired.

The stop pin 53 projecting from the priming valve through the slot 54 limits the movement of the rimer valve. For convenience in operatlon the primer valve is comiected to the means for operating the valve being .provided with a hub portion 57 through which the stem is arranged, the

central portion being slotted at 58 to receive the pin 59, thus permitting a limitedlost motion connection between the valve and its stem. A spring 60 is connected to this pin and the valve and normally supports the valve on its stem s0 that the end of the slot 58 normally engages the pin. This permits the turning of the stem after the valve 10 is closed and the connections for the primer are positioned so that the priming valve is opened after the air valve is closed, thus permitting cutting olf the cold air supply when the priming valve is in use; This also has the further advantage of utilizing the operating connections for the priming and air inlet valve. l

With the parts thus arranged,-we are able to secure a roper priming under various weather conditions in a carbureter having an automatically actuated fuel inlet valve.

l For instance,'in warm weather it is found that proper priming is effected by the opening of the throttle and the primer valve. I In cool. weather better results are obtained by closing the throttle and opening the priming valve. While our improved primer mechanism 1s particularly adapted and desirable for use in our improved carbureter illustrated, it is also well adapted for use in structures departing considerably therefrom in structural details.

Having thus described our invention, what-.we claim as new and desire to secure by Letters Patent, is:

l. In a carbureter, the combination of an air valve, a rotary primer valve, an air valve stem alined with said primer valve and hav- 111gy a tongue and slot connection therewith, said air valve being mounted for limited ro tative movement on its stein, a spring for holding said air valve yieldingly in its fort ward position on its stem, and meansfor actuating said air valve stem whereby said primer valve may be opened and closed While the air valve is4 closed. c

2. In a carbureter, thecombination of an air valve,'a primer valve, 'an air valve stem operatively connected to said primer valve,

said air valve'being mounted for limited rotative movement on its stem, a spring for yholding said air valve yieldiiigl in its forward osition on its stem,-an means for actuating said air valve stem whereby said primer valve may be opened and 'closed while the air valve is closed.-

valve stem operatively connected to said primer valve, said air valve having a lost motion connection to its stein includin a spring for holding it yieldingl in its orward position on its stem an permitting actuation of the stem while the air valve is y, `body having an air valve seat therein, the

' chamber'above said valve seat constituting a mixing chamber and the chamber below an air inlet chamber, a throttle valve for said mixing chamber, a suction actuated member constituting a mixing chamber air inlet valve coacting with said valve seat and havin-g a carbureting chamber therein delivering to saidmixing chamber, afuel reservoir, a fuel nozzle communicating with said reservoir and delivering to said carbureting chamber, there being a priming 'passage comprising a tube depending into said fuel reservoir and delivering to said mixing chamber above said mixing chamber air in) 95 let valve seat, a fuel valve carried by said suction actuated member and coacting with said nozzle, a carbureting chamber air inlet valve carried by said suction actuated member, and a rotatable valve vfor said priming l passage having af transverse port therein and a longitudinal passage communicating with l said port and opening into said air inlet chamber. v v

6. In a carbureter, the combination of a body having an air valve seat therein, the chamber above said valve seat constituting a mixing chamber and the chamber below an air inlet chamber, a suction actuated membei' constituting a mixing chamber'ar inlet 110 'valve coacting'with said valve seat' andhaving a carbureting chamber therein deliverf in to said mixing chamber, a fuel reservoir, a uel nozzle communicating therewith and delivering to said carbureting chamber, a fuel valve carried by said suction actuated member and coactin with'saidnozzle, a carbureting chamber air inlet valve carried by said suction actuated member, there 'being a priming passage from said fuel reservoir de-l livering to said mixing chamber above' said air inlet valve seat andan air passage connecting said priming -passage with said air' inlet chamber and a valvefor. said passages.

7. In a Carlini-eter, thel .combination of a body provided with an air inlet chamber and a mixing chamber, a suction -actuated air inlet valve, for said mixing chamber, a carbureting chamber delivering to said mixing chamber, a carbureting chamber air inlet 130,

k up

chamber valve,vand a rotatable valve forl said passage having a transverse port therein and a longitudinal passage communicating with sai'd port and' opening into said air inlet chamber.

8. In a carbureter, the combination of' a body provided with an air inlet chamber air inlet valve for said mixing chamber, a carbureting chamber delivering to said mixing chamber, a carbureting chamber air inlet valve actuated by said mixing chamber valve, a fuel reservoir having delivery connections to said carbureting chamber, there being a priming passage from said fuel reservoir delivering to said mixing chamber above said mixing chamber inlet valve and an air passage connecting said priming passage with said air inlet chamber, and a valve for saidp'assages.

9. In a carbureter, the combination of a mixing chamber, a carbureting chamber delivering to said mixing chamber, a throttle valve for said mixing chamber, a suction actuated member constituting an air inlet valve for said mixing chamber, carbureting chamber and fuel valves carried by said air actuated member, a fuel reservoir having delivery connections to said carbureting chamber, there being a priming passage from said fuel reservoir delivering to said mixing chamber above its air inlet valve, and. a rotatable valve for said passage havin atransverse port therein and a longitudinal air inlet passage opening on the outside of said mixing chamber.

10. In a vcarbureter, the combination of asuction actuated air inlet valve, a fuel valve actuated thereby, a fuelnreservoir, there being a priming fuel passage'delivering at the rear of said air inlet valve, and a rotatable valve for-said assage having a transverse port therein and) a longitudinal air inlet passage opening in front of said air inlet valve.

11. In a carbureter, the combination of a body provided With an air inlet chamber and a mixing chamber, a throttle valve for said mixing chamber, a suction actuated air inlet valve for said mixing chamber, a fuel reservoir, a fuel feed valve actuated by said mixing chamber-valve,there-*being a priming passage connecting said fuel reservoir with said mixin chamber above said mixing chamber va ve and a priming conduit delivering above said throttle, and a priming valve controlling said passage and having an air passage connecting said air inlet f, its fuel passage. and a mixing chamber, a suction actuated' chamber with its fuel passage, said mixing passage and conduit being open simultaneously.

12. In -a carbureter, the combination ofa body provided with an air inlet chamber and a mixing chamber, a throttle valve for said mixing chamber, a suction actuated air inlet valve for said mixing chamber, a main fuel feed valve actuated by said mixing chamber valve, a fuel feed reservoir, there being a priming'conduit delivering above said throttle, and a priming valve controlling said conduit and having an air passage connecting said air inlet chamber with 13. A carbureter comprising a suction actuated air inlet valve, a throttle valve at the rear of said air inlet valve, a fuel reservoir, there being a priming fuel passage delivering at the rear of said air inlet valve and a priming conduit delivering at the rear of said throttle valve, and a valve for said passage and conduit.

14. In a carbureter, the combination of a suction actuated air inlet valve, a throttle valve at the rear of said air inlet valve, a fuel valve actuated by said air inlet valve, a fuel reservoir, by-passes, one of the bypasses delivering at the rear of the air actuated inlet valve and the other at the rear of said throttle valve, and a common valve for said by-passes provided with an air passage communicating With its fuel passage.

15. In a carbureter, the combination of a.

tion actuated air inlet valve and the other at the rear of said throttle valve, and a common valve for said by-passes.

16. In a carbureter, the combination of a suction actuated air inlet valve, a throttle valve at the rear of said air inlet valve, a fuel valve actuated by said air inlet valve, a fuel reservoir, a by-pass delivering at the rear ofthe said throttle valve, and a valve for said by-pass provided with an air passage communicating with its fuel passage.

17. .In a carbureter, the combination of a suction actuated air inlet valve, a throttle valve at the rear of said air inlet valve, a fuel valve actuated by said air inlet valve, a fuel reservoir,'there being a by-pass for said fuel reservoir delivering at the rear of and adjacent to the throttle valve when it is in its closed position, and a valve for said by-pass having an air passage communicating with its fuel passage.

18.v In a carbureter, the combination of a suction actuated air inlet valve, a fuel valve actuated by said air inlet valve, a priming vpassage connected to a source of fuel supdelivering at the rear of air inlet valve, and avalve for said priming passage proand a valve for said prlmmg passage provided with meansfor admitting air to said vided with means for admitting air to sald passage.

passage. In witness whereof, we have hereunto set 15 5 19. In a carbureter, the combination of a our hands and seals in the presence of two suction actuated air inlet valve, a throttle witnesses.

valve at the rear of saidair inlet valve, a f WILLIAM SHAKESPEARE, Jn. p.. a] fuel valve actuated by said air inlet valve, WILLIAM SCHMID. [1.. ai a priming passage connected to a source of Witnesses:

10 fuel supply independently of said uel valve LUELLA G. GREENFIELD,

delivering at the rear of said throttle valve, MARGARET L. GLASGOW. 

